B3860 datasheet(3/5 Pages) EPCOS

3 / 5 page

Aug 02, 2002

SAW Components

B3860

445,25 MHz

Low-Loss Filter

Preliminary Data Sheet

Characteristics

Operating temperature:

= -25 ... +75 ˚C

Terminating source impedance:

ZS =75 Ω and matching network

Terminating load impedance:

ZL =75 Ω and matching network

Matching circuit:

Cp1 = 12pF 2)

Ls2 = 18nH 2)

Ls3 = 18nH 2)

Cp4 = 12pF 2)

1) Temperature dependance of fc: fc(TA) = fc(T0)(1 + TCf(TA – T0)2)

2) Element values depend on PCB layout

min.

typ.

max.

Nominal frequency

—

445,25

—

MHz

Insertion attenuation at

fN (T=25 ˚C)

6,5

8,5

9,5

Variation of insertion att. (rel. to

rel

——

±0,9

Frequency response

3 dB Lower frequency

fL 3dB

—

444,40

444,75 MHz

3 dB Upper frequency

fU 3dB

445,75

446,40

—

MHz

35 dB Lower frequency

fL35dB

442,25

442,90

—

MHz

35 dB Upper frequency

fU35dB

—

448,00

448,25 MHz

Amplitude ripple (peak to adjacent valley)

fN ± 100 kHz

—

0,3

0,5

Relative attenuation

rel

fN - 200,0 MHz ... fN - 10,0 MHz

—

fN - 10,0 MHz ... fN -

3,0 MHz

—

fN +

3,0 MHz ...

fN + 10,0 MHz

—

fN + 10,0 MHz ... fN + 200,0 MHz

—

Temperature coefficient of frequency 1)

TCf

—

– 0,036

—

ppm/K2

Turnover temperature

—25

—

˚C

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